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Implication of Fluorine Atom on Electronic Properties, Ordering Structures, and Photovoltaic Performance in Naphthobisthiadiazole-Based Semiconducting Polymers
Open accessAbstract
The development of semiconducting polymers is imperative to improve the performance of polymer-based solar cells (PSCs). In this study, new semiconducting polymers based on naphtho[1,2-c:5,6-c']bis[1,2,5]thiadiazole (NTz), PNTz4TF2 and PNTz4TF4, having 3,3'-difluoro-2,2'-bithiophene and 3,3',4,4'-tetrafluoro-2,2'-bithiophene, respectively, are designed and synthesized. These polymers possess a deeper HOMO energy level than their counterpart, PNTz4T, which results in higher open-circuit voltages in solar cells. This concequently reduces the photon energy loss that is one of the most important issues surrounding PSCs. The PNTz4TF4 cell exhibits up to 6.5% power conversion efficiency (PCE), whereas the PNTz4TF2 cell demonstrates outstanding device performance with as high as 10.5% PCE, which is quite high for PSCs. We further discuss the performances of the PSCs based on these polymers by correlating the charge generation and recombination dynamics with the polymer structure and ordering structure. We believe that the results provide new insights into the design of semiconducting polymers and that there is still much room for improvement of PSC efficiency.
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Citations
Cites
Conjugated Polymer-Based Organic Solar Cells
Günes, S., Neugebauer, H., & Sariciftci, N. S. (2007) · Chemical Reviews · doi:10.1021/cr050149z · Cited by 6,279
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The Curious Case of Fluorination of Conjugated Polymers for Solar Cells
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Metadata
- Authors
- Kawashima, K., Fukuhara, T., Suda, Y., Suzuki, Y., Koganezawa, T., Yoshida, H., Ohkita, H., Osaka, I., & Takimiya, K.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2016-08-05
- Volume
- 138
- Issue
- 32
- Pages
- 10265-10275
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2494810283
- Cited by
- 342
- References
- 1
- FWCI
- 27.59
- Type
- journal article
- Language
- en
- Open access
- green
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- The paper
- Kawashima, K., Fukuhara, T., Suda, Y., Suzuki, Y., Koganezawa, T., Yoshida, H., Ohkita, H., Osaka, I., & Takimiya, K. (2016). Implication of Fluorine Atom on Electronic Properties, Ordering Structures, and Photovoltaic Performance in Naphthobisthiadiazole-Based Semiconducting Polymers. Journal of the American Chemical Society. https://doi.org/10.1021/jacs.6b05418
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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